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I've got an older Imac G5 from my employer. I want to reinstall Mac OS X so I will start afresh. When I try to run 'Install Mac OS X from the CD' MAC OS X Install CD ' then the program will start up a split second and then disappear / close down. Have tried to hold C and reboot - same problem. Someone who can help as' Install Mac OS X can boot.
Version on CD. - version 10.1.3 (should have followed with iMac)
Version on imac - version 10.4.11

If the PPC machines are like the Intel ones, it's highly unlikely that you are going to be able to install a version of OS X older than the one the machine shipped with. Don't quote me, but I think all G5s shipped with either 10.3 or 10.4.

I cannot be held responsible for the things that come out of my mouth.
In the Windows world, most everything folks don't understand is called a virus.

Thanks for the answers. I am new in Imac's.
The disk which was included from my employee was version 10.1.3 and this do not run with a G5 (I can understand on you guys)
How can I legally reinstal the Imac with a version 10.4 or new'er and what is the price for it ?
Thanks in advice.

Have a look on eBay and CraigList etc for a full retail install DVD of the operating system you want, but do not purchase so called update, install, drop in etc discs as these are silver/grey and will work only with the model the discs came with.

For a G5 suggest looking for Leopard OS X.5 which can be updated to OS X.5.8, as high as your Power PC G5 can go. Expect to pay around the $100 mark, or even more.

Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!